Transcript Road Map for Improvement of

3rd Arab Union of Electricity,
Electricity Distribution Conference
Salalah-Sultanate Oman
27th – 29th August 2012
Presented by:
Eng. A.Aziz Al Alawi
Director,
Electricity Distribution Directorate
Kingdom of Bahrain
Contents
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Road Map for Improvement of SAIFI , SAIDI & CAIDI
DMAIC Approach
Learning From The Current Experience
Electricity Distribution Directorate (EDD) Maintenance Process
Operational Loading Policy of Feeders
Maintenance Policy
EDD Maintenance Strategies
Maintenance Criteria
Maintenance Program 2011-2012
HV / LV Reinforcement & Replacement Program
11kV Cable Fault Elimination
Improvement Program 2012-2013
SAIFI, SAIDI, CAIDI Targets
Recommendations
Road Map for Improvement of SAIFI , SAIDI & CAIDI
KPIs
An Assessment tool for
improvement process
Presented by
Engineer Heyam Nassr
Maintenance
Practice
Operation & Loading
Policy
Improvement
Improvement of KPI (SAIFI, SAIDI, CAIDI)
Improvement
Maintenance
programs
Reinforcement &
Replacement
Programs
11kV & LV Cable
Fault Elemenation
Achievement
of Target
DMAIC APPROACH
Define
(D)
Control
(C)
Implement
(I)
Measure
(M)
Analyze
(A)
Learning From The Current Experience
Policies, SOPs, Design,
Specifications, Strategy
Fixed Time
Maintainence
Condition
Monitoring
Program
Prevention
Condition Based
Maintenance
Asset
Replacement
Program
Prevention
Reliability and Quality- Power Delivery
Containment
Network
Protection
Systems
Remote Controlling
and Monitoring
Capabilities
Operational
Readiness and
Fast Response
Generator
Mobilization
Containment
Decide What To Do Based On Our Own Experience
EDD Maintenance Process
Ensuring and Controlling
the reliability of HV & LV
Networks
Maintenance
FUNCTION
Controlling and
monitoring of
Productivity,
Effectiveness, and
Organization
Efficiency.
To align EDD’s objectives
with EWA‘s objectives of
achieving the agreed N/W
operating conditions and
quality, within the accepted
N/W conditions and safety
standards and at minimum
cost.
Maintenance
OBJECTIVES
CONTROL systems
to check if the plan
and organization are
meeting the
objectives and to
correct if necessary
• 3-Lines Maintenance
• Wall boxes, Service
Twin Wires, 11kV
Over head lines and
s/s
Establishing a
PLAN to
achieve the
maintenance
Objective
• 3 Maintenance Depots
of Muharraq, Manama
and Riffa
• Outsourcing .
• Implementing of Asset
Management Concept.
Building an
ORGANIZATION to
carry out the plan
Operational Loading Policy of Feeders
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11kV network
•
150A(3 MVA) up to open point for copper cable feeders (50% cable
loaded)
•
125A (2.5MVA) up to open point for aluminum cable feeders (50%
cable loaded)
•
Controlled by Distribution Control Centre (DCC)
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400V network
•
Maximum feeder load is 150kVA
(5*60Amp, 3*100Amp, 2*160Amp or 1*250Amps)
•
Controlled by Low Voltage Operations
Maintenance Policy
 Maintenance Scheduling:
• Planned maintenance will be scheduled on an annual and monthly basis and be
approved, in advance by DCC & LV Operation, as appropriate.
• Preventive maintenance and corrective maintenance should be planned and
scheduled jointly by Maintenance & Operations groups.
• Overtime will be authorized based on the related Standard Operating Procedure
(SOP).
 Materials Requirements:
• Maintenance planning will include identification of requirements of materials and
manpower; EDD and outsourced.
• Materials Requirements will be identified and expressed by Maintenance Group.
• Planning & Materials section will then deliver materials as and when specified.
 Safety and Operating Procedures:
• HV and LV isolation works shall be done in accordance with the standard operating
procedures.
• Mobilization of generators connection shall be done in accordance with standard
operating procedure.
EDD Maintenance Strategies
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3-lines Maintenance Strategy.
Continuous improvement of the network: Reinforcement and Correction
Maintenance.
Fully implementation of CASCADE, via computerized Maintenance
Management System.
Staff training and development (Multi skilling)
Deployment of new technologies such as Responder, to enhance quality of
our services.
3-Lines Maintenance Strategy
 First Line Maintenance Strategy
o
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To Carry-Out Inspection:
•
Objectively, by using Infrared Camera for inspection of
Transformers, LV Panels & 11kv Overhead), 11KV Network
partial Discharge test. (Condition Based Maintenance)
•
Subjectively, by visually inspection of HV and LV transformer
connection, oil checking, silica gel checking, etc.
To Respond to Inspection Results:
•
Cleaning and minor rectification of equipment defects of LV
Panel Board and Ring Main Units (RMUs)
•
Refurbishment and cleaning of wall boxes.
 Second Line Maintenance Strategy
o
Replacement of defective items/components based on:
• Inspection of the First Line Maintenance
• Time Schedule Maintenance.
 Third Line Maintenance Strategy
o
Life cycle Asset Assessment:
•
Transformers (35-40 years),
•
RMUs Oil (25 years) and RMU SF6 (15 years),
•
LV Board (30 years),
•
HV Cables (40 years), LV cables (35 years),
•
11kV poles switches (35 years),
•
Air Break Switches(35 years)
Maintenance Criteria
Electrical Equipment
Frequency
Distribution Substation Equipments
Four Years
Intake Substation Equipments
Two Years
11kV Overhead Lines
Two Years
Wall Boxes
Three Years
Substation Civil Structures
•
Based on the annual inspection of S/S Maintenance Section, urgent repairs
will be carried out by Civil Unit.
•
For those substations which are ten years or older, a five yearly inspection
is carried out by civil unit.
•
Block work enclosure for package units and replacement of wooden doors
is on going.
Maintenance Program 2011-2012
Nov
2011
Dec
Jan
2012
Feb
Mar
Apr
May
Jun
Jun
Aug
Sep
Oct
Nov
Dec
2012
1. Inspection and Overall
of All 11kV O/H Lines
2. Maintenance of 15,000
Wall Boxes
3.
4.
5.
6.
7.
Replacement of 20 km of service twin wires.
Maintenance of 1,000 Substations.
The target will be increased to 4,000 Substations (S/S) for 2012,2013 .
Inspection of all overloaded Substations with emphasis on equipment with
history of repeated faults.
Replacement of 200 units of transformer RMUs and LV Panels in the
Substations.
Inspection and maintenance of 11 kV circuits terminations in Primary S/S, and
in coordination with Transmission Directorate program.
Maintenance Program 2011-2012
8.
11kV Partial Discharge measurements for feeders whose load is more than
300Amp.
9.
Upgrade Transformers of which loads exceed 80% of it capacity.
10.
Verifying functionality of 11kV protection system in RMUs.
11.
Replace any RMUs of which fault current capacity is lower than 350MVA.
12.
Install Moulded Case Circuit Breakers (MCCB) at Customer side.
13.
Using Mini Feeder Pillars for the 400 Volts N/W.
14.
Activate/ install new Earth Fault Indicators (EFIs).
15.
Procurement of advanced HV Cable Fault locating equipment.
HV / LV Reinforcement & Replacement Program
o HV reinforcement
43
o HV cable replacement
5
o LV reinforcement
496
o LV replacement
71
o Uprating transformer from 1000kVA to 1500KVA
81
11kV Cable Fault Elimination
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Partnership with Electricity Distribution Directorate
Pre-qualification of Contractors
Work Specifications / Job Catalogue
Training on proper practices - Contractors
Cable Joint procedures / Tools
Procedure for Contractor reporting of materials defects
Qualification of Supervisors/inspectors
Supervisors Procedure and List of Actions by the Supervisors
Maintain proper record of Joints/Cables? Tagging system
Procedure for Supervisor reporting of materials defects /bad workmanship
Training on proper practices – EDD Supervisors
Improvement Program 2012-2013
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Automation of RMU Operations
Automation of Earth Fault Indicators
MCCB (Moulded Case Circuit Breakers) to control unauthorized load
To replace the LV Underground joints with Mini Feeder Pillars
Activation of CASCADE system (Computerised Maintenance System)
Utilization of Vehicle Tracking System
SAIFI, SAIDI, CAIDI Targets
The number of interruptions 2011 and 2012
 The interruptions in 2012 increased due to unauthorised loads.
SAIFI, SAIDI, CAIDI Target
2011
(April-May-Jun-Jul)
SAIFI
SAIDI
CAIDI
2012
(April-May-Jun-Jul)
0.7
0.2
interruptions/customer interruptions/customer
107
minutes/customer
77
minutes/customer
143
379
minutes/interruptions minutes/interruptions
%
Improved
Target
71.43%
0.5
interruptions/customer
28.04%
25
minutes/customer
-165.03%
50
minutes/interruptions
 Significant improvement is registered in SAIFI & SAIDI in 2012 over 2011.
Recommendations
 Learning from the current experience and decide what to do based on our
experience
 People Drive Performance – enabling more people across the enterprise to
increase competitive advantage
 Adaption of 3 skilled capabilities (Monitoring, Analyse, Plan)
•
Superiority in Monitoring – The monitoring capabilities will allow to
execute on strategy and to increase the competitive advantage by
improving on benchmarks on day-to-day operations.
•
Superiority in Analyse – The analytic capabilities can be leveraged to
enhance monitoring and planning capabilities.
•
Superiority in the Plan – The capability in plan can attain the power to
compete and to increase monitor plan & budget forecasts more broadly
across the board.
T H A N K Y O U